What are the functions of L-shaped anchor bolts?
Introduction of L-type Anchor Bolts (7-shape Foundation Bolts)
L-type anchor bolts are bent into a 7-shape. The horizontal bent hook at the bottom is pre-embedded into concrete, while the top section is fully threaded to fasten equipment or steel base plates with matching nuts and washers. They are manufactured in accordance with GB/T799 national standard, widely used as primary embedded anchoring fasteners.
Core Functions
1. Excellent Pull-out Resistance
The 90° bent hook forms a mechanical interlock with solidified concrete, boosting pull-out resistance by over 30% compared to straight studs. It prevents the bolt from being pulled out under lifting force or wind load, eliminating overturn risks of facilities.
2. Shear & Horizontal Displacement Prevention
The horizontal hook locks the bolt firmly to counteract lateral shifting caused by equipment vibration, strong wind and seismic force, keeping the base fixed in position without offset.
3. Full Load Transmission
They transfer the dead weight of steel structures, mechanical equipment and dynamic vibration loads uniformly to the concrete foundation, dispersing pressure and avoiding local concrete cracking.
Equipment Leveling & Locking
1. Rigid Connection
Steel columns, fans, machine tools and billboard bases are mounted onto the threaded segment. Tightening nuts achieves rigid integration between facilities and concrete foundation.
2. Height Adjustment
Sufficient exposed thread allows vertical adjustment via nuts to calibrate horizontal balance, offsetting minor height errors of concrete foundations and guaranteeing precise equipment operation.
Earthquake & Overturn Protection
They counteract overturning torque generated by gales and earthquakes for light factory buildings, curtain walls, photovoltaic supports and lamp posts to avoid tilting or collapse. For continuously vibrating machinery such as water pumps and air compressors, L-type bolts buffer shock impact and prevent loosening after long-term operation.
Construction Advantage
1. One-piece bent forming without welding joints, easy positioning during pre-embedding, high construction efficiency and cost-effective for medium & light-duty projects.
2. The flat bent hook is fully wrapped by poured concrete, easy to fix on positioning formwork and free from displacement during casting.
Typical Application Scenarios
• Light factory steel columns & frame embedded parts
• Base fixing for water pumps, fans, machine tools and air compressors
• Photovoltaic brackets, street lamps, billboards and guardrail bases
• Curtain wall keels, auxiliary embedded parts for small tower cranes & pipeline support bases
Product Selection Note
L-type 7-shape anchor bolts apply to medium and light load projects. For heavy-duty large-load equipment, 9-shape anchor bolts or anchor plate foundation bolts are recommended.
Best-selling specifications in our product range: M12, M16, M20
Feel free to contact us at any time if you need L-type 7-shape anchor bolts, embedded anchor bolts or fasteners of other specifications. We offer free quotations 24 hours a day.
Our factory supplies a complete range of fasteners to manufacturers worldwide, and we sincerely look forward to establishing cooperation with you.
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